LM2903W datasheet(7/13 Pages) STMICROELECTRONICS

部件名	LM2903W

功能描述	Low-power dual voltage comparator

PDF	13 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

7 / 13 page

LM2903W

Typical application schematics

Doc ID 022662 Rev 1

7/13

Figure 13.

Low frequency op- amp with offset

adjust

Figure 14.

Zero crossing detector (single

power supply)

2N 2222

5 V

100 k

1 k

5 V

1 M

100 k

1 M

Offset adjust

15 k

0.5

μF

1/ 2

LM2903

100 k

10 k

20 M

5 V

1N4148

5.1 k

100 k

1/ 2

LM2903

5.1 k

Figure 15.

Limit comparator

Figure 16.

Split-supply applications - zero

crossing detector

10 k

(ref)

high

(ref)

low

2N 2222

Lamp

1/ 2

LM2903

1/2

LM2903

(12 V)

15 V

5.1 k

15 V

1/2

LM2903

Figure 17.

Crystal controlled oscillator

Figure 18.

Comparator with a negative

reference

2 k

200 k

100 k

200 k

1/2

LM2903

0.1

μF

f = 100 kHz

= 15 V

15 V

5.1 k

15 V

5 V

1/2

LM2903

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